Walter b



(No Model.)

W. B'. GRIFPTHS. DEVICE F03 LAYING OPF GEUMETBIGAL HGURES.

No.-462,126. @at'enized Oct.. 2?, 18M.

lijrti'r W'AIJFER B. GRIFFITHS, OF NEV YORK, N. Y.

CiEVlCl FUR LAYlNG OFFGEOWIETMCAL FIGURES.

sPEctFIcATIoN forming par@ of Letters :Patent No. `462,126, dated october 27, 1891.

Application ined Aprn 25,1891. serai Ne. 390.443. (No model.)

To all whom 'zit 'nw/'ry concern.- i

.lie it known that I, WALTER B. GRIFFIN-1s, a citizen of theUnitedStates, residing atfNew York, in the county and State of New York, have invented new and us'et'n Improvements in Devices tor Laying OitGeometrical Figures and Designs, of which the following specication. l

This invention relates to certain, improvements in a device for laying oii geometrical iigures and other designs, said improvements beingr pointed out in the follorwing'speeilication and claim, and illustrateddu the accompanying drawings,in whieh-I Figure l represents a face view ol a device embodying my invention. .;rb.; 2 is a face View ot' a design indicating ithemanner in which my device can be used.,

In the drawings, the letter A designates a polygonal disk, which can be in the form of a triangle, preferably equllateral, as shown in this example. Within ,the body of the disk is a hole or perforation KBi, which is sufiiciently large to receive a pimabout which, as a center, the disk can be rotated. On the surface of the disk is cngifayed or stamped a protraci'or D, with the perforation l5 as a center, and the material forming one quadrant of the protractor is cutaway to form an opening E, in order that the, degrees can be transferred uponthe sheet to he drawn upon. On the center ends of the lines which Lindicate the degrees of `the protraotor are madeholes rl d', through which the pencil-point can pass. By inserting the pencil-point through one of said holes and, rotating the disk round a pin inserted through the hole IS a circle ofa determined diameter can he drawn, which can he divided into a number ot' equal parts by passing the pencil-point through selected equidistant holes d or d. 'lhe base b of the triangulaidisk is provided with a scale G, and on the inner ends of the division-,lines of this scale are perfor-ations g, so that by passing a pin through one ot these perforations and passing the pencil-point through another perforation a circle can he described the radius of which is equal. to the distance between the two perforations. In the body of the disk openings are cut to torin ornamental designs H, I, J, and K, and also circles of various diameters, such as L and M, and through .the

desiarns H, I, and J and also through the circles L i are drawn radial lines 7i ij, which assist materially to locate said designs in the exact position. It will also be secu that the corners l of the disk A are cnt away at right angles to the radial lines 7i, 11j, so that the ends of these radial lines can be easily and correctly placed over corresponding radial lines 7L ij, on which th "various designs II' I J L M are to be located, as indicatedgin Fig. 2.

My device can be used with great. advantage for laying outlmtterns for lace curtains, borders for paper hangings, and other articles, and it can also be used with advaiitage for educational'purposes.

Idistinctly disclaim in my present application everything shown and described in Letters Iatent No. 364,508, granted to me June 7,1887. 4

NVhat I claim as new, and desire to secure by Letters Patent, is-

A disk forming an equilateral triangle havi ing its corners cut away in the linesl and provided with a center l, ornamental designs 1I I J, and circular openings LM, situated on radial lines L ij, which extend from the center of the disk to the lines l, substantially as described.

In testimony Where-of I have hereunto set my hand in the presence of two subscribing witnesses.

WALTER li. GRIFFI'IIIS.

Witnesses:

WM. C. HAUFF, E. F. I{.isTENn-Vnnn. 

